Set-collar.



Patented Aug. 3, 1909 SET COLLAR APPLICATION FILED APR. 17, 1908.

- witnesses unrrnn srarns ISRAEL W. EXLEY, OF OOLVILLE, WASHINGTON.

SET-COLLAR.

To all whom it may concern:

Specification of Letters Patent. Application filed April 17, 1908.

Patented Aug. 8, 1909. Serial No. 427,628.

element- 3 Be it known that I, ISRAEL W EXLEY, a upon the face of the collar 2.

citizen of the United States, residing at Colville, in the county of Stevens and State of Washington, have invented new and useful improvements in Set-Collars, of which the following is a specification.

T he invention relates to set collars for shafts, and the object of the invention is to provide a set collar with an effective retaining means whereby the danger of the collar becoming loosened upon the shaft will be entirely eliminated.

With these objects in view the invention resides in providing an ordinary set collar with a retaining element having a projecting head, and a second collar having its inner periphery provided opening and a central municating with the longitudinal opening the longitudinal opening being adapted for the reception of the headed retaining element upon the first collar and to direct itwithin the angular recess, when the second collar is rotated and the longitudinal recess left open for the reception of a retaining wedge or loclz.

To these ends the invention resides in the novel construction of elements and their arrangement in operative combination hereinafter fully described and claimed.

In the accompanying drawings, Figure l is a longitudinal sectional view of a set collar constructed in accordance with the presant invention and being taken upon the line l-l of Fig. 3. 2 is a similar sectional view taken upon the line 22 of Fig. 3. Fig. 3 is a central transverse sectional view f the device. Fig. 4 is a detail perspective iew of the first collar having the headed 'etaining element. Fig. 5 is a similar view f the looking or securing collar.

mhe accompanying drawings the nuieral 1 designates a shaft for pulleys, of the rdinary construction. Secured upon this haft l is a collar 2. This collar 2 is roided with an opening alining with a thread- :l opening in the shaft 1 and these openings re adapted for the reception of a retaining with a longitudinal angular recess comcoll The numeral 5 designates the securing collar. This collar has its inner periphery of a size equaling the outer annular surface of the collar 2. The collar 5 has its inner periphery provided with a longitudinal passage (5, of a size approximately equaling that of. the headed projection alof the retaining element- 3. Cooperating with the longitudinal opening 6 is a central angular passage 7, having its walls diminishing from its point of connection with the surface of the cut away portion 6.

lVhen the collar 2 is positioned upon the shaft 1, the collar 5 is inserted upon the collar 2, the longitudinal opening 6 provided by the collar 5 being inserted over the projecting head a of the retaining element 3. -When the head 4. of the retaining element is brought into alinement with the passage 7 of the collar 5, the collar is rotated so as to bring the head within the passage 7 and away from the passage 6. When this is accomplished a wedge or locking element 8 is inserted in the longitudinal passage 6 and the collars 2 and 5 securely locked upon each other, and the retaining element 3 efiectively locked and held in position upon the shaft 1.

From the foregoing description it will be seen that the invention provides a set collar which is perfectly smooth upon its outer face, thereby presenting no obstructions, such as set screws or the like, and thus obviating the liability of accidents which frequently occur by such obstructions contacting the clothing of persons passing the shaft. It will be further noted that a plurality of set collars may be employed upon a shaft, and that the outer collars may be readily removed by simply withdrawing the wedge or locking element 8.

Having thus fully described the invention what is claimed as new is:

In a device of the character described, a shaft provided with a threaded orifice, a ar provided with an orifice adapted to aline with the orifice of the shaft, a threaded element having an enlarged squared head provided with a head l projecting engaging the said orifices, a second collar having a longitudinal cut away portion extending its entire width, and a centrally arranged wedge shaped recess transversely of and communicating with the longitudinal cut away portion, the second collar being adapted to he slid over the first collar and the head of the threaded element connecting the first collar with the shaftpositioned within the wedge shaped recess, and a re- 10 taining member for the longitudinal slot of the second collar.

In testimony whereof I aflix my signature in presence of two witnesses.

ISRAEL EXLEY.

Witnesses E. S. EXLEY Gr. V. EXLEY. 

